1、​Great for building a prototype of an electronic circuit. 2、Universal bread board is 5 x 7cm, 54mm hole pitch, hole diameter is approx. 1mm. 3、Referencing letters printed on both sides for easy reference of individual holes. 4、The board is treated with flux for easy soldering and extended serving life. 5、Universal prototype circuit board, double sided, tin plated, used for point to point DIY soldering. Features: Great for building a prototype of an electronic circuit. Universal bread board is 5 x 7cm, 2. 54mm hole pitch, hole diameter is approx. 1mm. Referencing letters printed on both sides for easy reference of individual holes. The board is treated with flux for easy soldering and extended serving life. Universal prototype circuit board, double sided, tin plated, used for point to point DIY soldering. Specifications: Material: Glass Fiber Hole Diameter: Approx. 1mm Hole Pitch: Approx. 2.54mm Size: Approx.50 * 70 * 1.5 mm/ 2.0* 2.8* 0.059in(Single)   Package List: 10*Universal Circuit Board